The IRS said 10%, or more than 600,000, of the 6.6 million returns claiming education credits it has received so far this tax season were improperly filed by tax software providers. As a result, those refunds could be delayed for as long as six weeks.

Last week, shares of H&amp;R Block tumbled after the company reported disappointing earnings. Now the leading tax preparation company says it made a mistake in filing more than 600,000 tax forms this year. That may delay refunds for those customers by up to six weeks.

A burst of hiring in February pushed stocks higher on Wall Street. The Dow Jones industrial average gained 67.58 points, or 0.5 percent, to 14,397.07, surpassing its previous record close Tuesday and logged a sixth straight increase Friday.

From the country's leading social networking website introducing a new site redesign to the leading digital music service explaining why it's capping usage, there will be plenty of news waiting to break in the coming days. Let's go over some of the items that will help shape the week that lies ahead on Wall Street.

H&R Block has been a laggard in its online efforts, while competitor Intuit's TurboTax keeps gaining market share. To start remedying the situation, H&R Block this week agreed to pay $287.5 million for 2SS Holdings, which develops the desktop and online tax prep software TaxACT.

Shares of tax preparer H&R Block fell 8% on Thursday as the company changed leadership on when Russ Smyth left his post as president and CEO to head a private company in Chicago and Alan Bennett was elected to replace him by the board of directors.